History of plural 1 change

In src/cli/format.rs, lines 15–17 on 7bd805ffb418c08c7e31385c5823b239cf46df3191bf326652ae31fa403cff77. Every change that wrote or deleted one of these lines, or deleted a line from between them. Exact, because each line keeps its identity across edits; edits elsewhere in the file are not here. Also: oxy log -L 15,17:src/cli/format.rs.